Clark Refractor
E481627
The Clark Refractor is a historic 24-inch refracting telescope at Lowell Observatory, renowned for its role in early planetary observations and public astronomy outreach.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Clark Refractor canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4943113 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Clark Refractor Context triple: [Lowell Observatory, hasFacility, Clark Refractor]
-
A.
Hale Telescope
The Hale Telescope is a historic 200-inch reflecting telescope at Palomar Observatory in California that was once the world’s largest and remains a landmark instrument in observational astronomy.
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B.
Goodsell Observatory
Goodsell Observatory is a historic astronomical observatory on the campus of Carleton College in Northfield, Minnesota, known for its distinctive Romanesque architecture and long-standing role in teaching and research in astronomy.
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C.
Swope Telescope
The Swope Telescope is a 1-meter-class optical telescope at Chile’s Las Campanas Observatory, known for its role in supernova and transient object discoveries.
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D.
Carter Observatory
Carter Observatory is a public astronomy center and planetarium in Wellington, New Zealand, offering stargazing experiences, educational exhibits, and space science programs.
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E.
Perkins Observatory
Perkins Observatory is an astronomical observatory in Ohio known for its public stargazing programs and educational outreach in astronomy.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Clark Refractor Target entity description: The Clark Refractor is a historic 24-inch refracting telescope at Lowell Observatory, renowned for its role in early planetary observations and public astronomy outreach.
-
A.
Hale Telescope
The Hale Telescope is a historic 200-inch reflecting telescope at Palomar Observatory in California that was once the world’s largest and remains a landmark instrument in observational astronomy.
-
B.
Goodsell Observatory
Goodsell Observatory is a historic astronomical observatory on the campus of Carleton College in Northfield, Minnesota, known for its distinctive Romanesque architecture and long-standing role in teaching and research in astronomy.
-
C.
Swope Telescope
The Swope Telescope is a 1-meter-class optical telescope at Chile’s Las Campanas Observatory, known for its role in supernova and transient object discoveries.
-
D.
Carter Observatory
Carter Observatory is a public astronomy center and planetarium in Wellington, New Zealand, offering stargazing experiences, educational exhibits, and space science programs.
-
E.
Perkins Observatory
Perkins Observatory is an astronomical observatory in Ohio known for its public stargazing programs and educational outreach in astronomy.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical telescope
ⓘ
historic scientific instrument ⓘ refracting telescope ⓘ |
| associatedWith |
Lowell Observatory historic campus
NERFINISHED
ⓘ
Percival Lowell NERFINISHED ⓘ |
| hasAperture |
0.61 meter
ⓘ
24 inch ⓘ |
| hasFocalLength | approximately 9 meters ⓘ |
| hasManufacturer | Alvan Clark & Sons NERFINISHED ⓘ |
| hasMirrorOrLensMaterial | optical glass ⓘ |
| hasMountType | equatorial mount ⓘ |
| hasNotableRole |
early planetary observations at Lowell Observatory
ⓘ
public astronomy programs at Lowell Observatory ⓘ |
| hasObjectiveLensMaker | Alvan Clark & Sons NERFINISHED ⓘ |
| hasObservationDome | Clark Dome at Lowell Observatory NERFINISHED ⓘ |
| hasObservationTarget |
Jupiter
NERFINISHED
ⓘ
Mars NERFINISHED ⓘ Moon NERFINISHED ⓘ Saturn NERFINISHED ⓘ Venus NERFINISHED ⓘ bright nebulae ⓘ double stars ⓘ star clusters ⓘ |
| hasOpticalDesign | achromatic refractor ⓘ |
| hasPrimaryUsePeriod | early 20th century ⓘ |
| hasScientificDiscipline |
astronomy
ⓘ
astrophysics ⓘ |
| hasTelescopeType | refractor ⓘ |
| heritageStatus | historic telescope ⓘ |
| isPartOf | Lowell Observatory historic instruments ⓘ |
| locatedIn |
Flagstaff, Arizona
NERFINISHED
ⓘ
Lowell Observatory NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| namedAfter | Alvan Clark NERFINISHED ⓘ |
| openToPublic | yes ⓘ |
| operatedBy | Lowell Observatory NERFINISHED ⓘ |
| usedBy | Percival Lowell NERFINISHED ⓘ |
| usedFor |
astronomical research
ⓘ
double star observation ⓘ educational programs ⓘ lunar observation ⓘ planetary observation ⓘ public night sky viewing ⓘ public outreach ⓘ solar system observation ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Clark Refractor Description of subject: The Clark Refractor is a historic 24-inch refracting telescope at Lowell Observatory, renowned for its role in early planetary observations and public astronomy outreach.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.